Question

How to read array of doubles from binary file in C++

Answer 1

#include <iostream>
#include <fstream>

using std::cout;
using std::endl;

int main()
{
	std::ifstream in("d:\\test.bin", std::ios::in | std::ios::binary);

	if (!in) {
		cout << "Error open input file" << endl;
		return 1;
	}

	double arr[3] = { 0, 0, 0 };

	in.read((char *)&arr, sizeof(arr));

	for (int i = 0; i < 3; i++)
		cout << arr[i] << ' ';

	cout << endl;


	return 0;
}

/*
run:

1.65 3.14 7.89

*/

 

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